Question

What is two stroke method of magnetising iron piece with example

Answer 1

Rubbing the nail with the permanent magnet causes a stronger, more lasting magnetism in the nail. For this to work, only one pole of the magnet must stroke the nail from one end to the other in a single direction. ... It usually takes around 20 to 30 strokes before the nail becomes sufficiently magnetized.

Answer 2

it's very simple
buy a magnet and strike it 15 times